/Engine/Plugins/Editor/EditorScriptingUtilities/Source/EditorScriptingUtilities/Public/EditorLevelLibrary.h
Create a new Actor in the level that contains a duplicate of all the Actors Static Meshes Component. The ActorsToJoin need to be in the same Level. This will have a low impact on performance but may help the edition by grouping the meshes under a single Actor.
The new created actor.
static [AActor](API\Runtime\Engine\GameFramework\AActor) * JoinStaticMeshActors ( const [TArray](API\Runtime\Core\Containers\TArray)< class [AStaticMeshActor](API\Runtime\Engine\Engine\AStaticMeshActor) * > & ActorsToJoin, const [FEditorScriptingJoinStaticMeshActorsOptions_Deprecated](API\Plugins\EditorScriptingUtilities\FEditorScripting-_1) & JoinOptions )